KR20160057667A

KR20160057667A - Floating offshore structure

Info

Publication number: KR20160057667A
Application number: KR1020140158550A
Authority: KR
Inventors: 이종훈; 김현조; 최용호
Original assignee: 삼성중공업 주식회사
Priority date: 2014-11-14
Filing date: 2014-11-14
Publication date: 2016-05-24

Abstract

A floating oceanic structure is disclosed. A floating offshore structure according to an embodiment of the present invention includes a platform; A first pontoon disposed below the platform and providing buoyancy to the platform; A second pontoon disposed below the platform and spaced apart from the first pontoon in a width direction of the platform and providing buoyancy to the platform; A first column interposed between the platform and the first pontoons to support the platform with respect to the first pontoons; And a second column interposed between the platform and the second pontoon to support the platform with respect to the second pontoon.

Description

{Floating offshore structure}

The present invention relates to a floating offshore structure.

Position keeping is important for floating offshore structures. To this end, a dynamic positioning system such as an azimuth thruster is installed, or a mooring system is installed in a relatively low-speed region.

The main disturbances that make it difficult to maintain position of floating oceanic structures are wind, blue and ocean currents. The wind acts on the supersonic structure to generate 6 degrees of freedom motion, and the strength of the wind depends on the size and shape of the superstructure.

The most important movement for the operation of the floating ocean structure performing the drilling work is the Heave motion. The up and down motion has a great influence on the design of the riser tensioner and the up-down motion compensator (Heave compensator), and drilling is not possible if excessive vertical motion is issued.

Therefore, it is urgent to develop a technique to prevent excessive floating movement of floating structure.

Published Patent Publication No. 1987-0004876 (Jun.

An embodiment of the present invention is to provide a floating offshore structure configured to reduce vertical movement.

According to an aspect of the present invention, A first pontoon disposed below the platform and providing buoyancy to the platform; A second pontoon disposed below the platform and spaced apart from the first pontoon in a width direction of the platform and providing buoyancy to the platform; A first column interposed between the platform and the first pontoons to support the platform with respect to the first pontoons; And a second column interposed between the platform and the second pontoon to support the platform with respect to the second pontoon.

The first column and the second column may be tilted in mutual radial directions such that the distance between the first column and the second column increases from top to bottom.

The first pontoon may have a recess formed in the first pontoon, and the second pontoon may have a recess formed in the second pontoon.

According to the embodiment of the present invention, since the distance between the first pontoon and the second pontoon is relatively large or the distance between the first pontoon or the second pontoon and the water surface is made relatively large, Compared with the offshore structure, the intensity of up and down motion is relatively small.

1 is a side view of a floating offshore structure according to an embodiment of the present invention,
2 is a front view of a floating offshore structure according to an embodiment of the present invention,
FIG. 3 is a view showing a comparative example of the floating ocean structure shown in FIG. 2,
FIG. 4 is a view showing a comparative example of the floating ocean structure shown in FIG. 1. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, do.

FIG. 1 is a side view of a floating offshore structure according to an embodiment of the present invention, and FIG. 2 is a front view of a floating offshore structure according to an embodiment of the present invention. 1 and 2, a floating offshore structure 100 includes a platform 110, a first pontoon 120, a second pontoon 130, a first column 140, a second column 140, (150), and performs a drilling operation or the like.

The platform 110 is located above the water surface. The platform 110 is equipped with various equipment 112 such as drilling equipment.

A first pontoon 120 and a second pontoon 130 are disposed under the platform 110. The first pontoon 120 and the second pontoon 130 provide buoyancy to the platform 110. The first pontoon 120 and the second pontoon 130 have a ballast tank (not shown) so that buoyancy can be adjusted.

The first pontoon 120 and the second pontoon 130 are spaced apart from each other in the width direction of the platform 110.

A first column 140 is interposed between the platform 110 and the first pontoon 120. The first column (140) supports the platform (110) relative to the first pontoon (120). The second column 150 is interposed between the platform 110 and the second pontoons 130. The second column 150 supports the platform 110 relative to the second pontoon 130.

The first column 140 and the second column 150 are inclined in mutually opposite directions when viewed in Fig. That is, the first column 140 and the second column 150 are inclined in opposite directions when viewed from the front. At this time, the first column 140 and the second column 150 are inclined such that the distance between the first column 140 and the second column 150 becomes larger from the top to the bottom.

In this regard, when a beam sea is incident on a floating offshore structure, the strength of the vertical movement of the floating offshore structure is proportional to the distance between the pontoons.

3 is a view showing a comparative example of the floating ocean structure 100 shown in FIG. In the floating oceanic structure 100-1 shown in Fig. 3, the facing columns C1 and C2 are each vertically extended. In this case, the distance D2 between the facing pontons P1 and P2 is equal to the distance between the facing columns C1 and C2.

The distance between the first column 140 and the second column 150 increases from the top to the bottom so that the distance between the first column 140 and the second column 150 increases, The distance D1 between the first pontoon 120 and the second pontoon 130 which are coupled with the lower end of the first pontoon 120 is relatively larger than that of the comparative example.

Therefore, the floating marine structure 100 according to the present embodiment is constructed such that the distance D1 between the first pontoon 120 and the second pontoon 130 is greater than the distance D1 between the pontoons of the floating offshore structure 100-1 P1 and P2, the intensity of the up-down movement is relatively small.

Referring to FIG. 1, a concave portion 125 recessed into the first pontoon 120 is formed on an upper surface of the first pontoon 120. Although not shown in FIG. 1, a concave recess may be formed in the second pontoon 130 on the upper surface of the second pontoon 130.

In this regard, when a beam sea is incident on a floating offshore structure, the strength of the up-down motion of the floating offshore structure is proportional to the distance between the center of the buoyancy of the pontoon and the water surface.

4 is a view showing a comparative example of the floating ocean structure 100 shown in FIG. The floating oceanic structure 100-2 shown in Fig. 4 has a conventional pontoon P1 without a recess formed therein. In this case, the strength of the up / down movement of the floating offshore structure 100-2 is influenced by the distance Z2 between the center of the buoyant force of the pontoon P1 and the water surface.

In the offshore structure 100 according to the present embodiment, the concave portion 125 is formed on the upper surface of the first pontoon 120 so as to be recessed into the first pontoon 120. The center of the buoyancy of the first pontoon 120 under the assumption that the pontoon P1 of the first embodiment is the same as the size and shape of the pontoon P1 except for the recess 125, P1). &Lt; / RTI > In this case, the distance Z1 between the first pontoon 120 and the water surface in this embodiment is larger than the distance Z2 between the pontoon P1 and the water surface in the comparative example.

Therefore, since the distance Z1 between the first pontoon 120 and the water surface is relatively larger than that of the comparative example, the strength of the vertical movement is relatively small.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: Floating marine structure
110: Platform
120: First pontoon
130: second pontoon
140: first column
150: second column

Claims

platform;
A first pontoon disposed below the platform and providing buoyancy to the platform;
A second pontoon disposed below the platform and spaced apart from the first pontoon in a width direction of the platform and providing buoyancy to the platform;
A first column interposed between the platform and the first pontoons to support the platform with respect to the first pontoons; And
And a second column interposed between the platform and the second pontoons to support the platform with respect to the second pontoons.

The method according to claim 1,
Wherein the first column and the second column are formed by a single-
Wherein the first column and the second column are inclined in mutual radial directions such that the distance between the first column and the second column increases from top to bottom.

3. The method according to claim 1 or 2,
A concave portion recessed into the first pontoon is formed on an upper surface of the first pontoon,
And a concave portion is formed in the upper surface of the second pontoon so as to be recessed into the second pontoon.